Add listener callback to keep track of tracing state in SCC
Test: N/A
Change-Id: Iae1fe69b65a449f7e94fecaa17081022b0888c7b
diff --git a/libs/gui/TransactionTracing.cpp b/libs/gui/TransactionTracing.cpp
new file mode 100644
index 0000000..eedc3df
--- /dev/null
+++ b/libs/gui/TransactionTracing.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "gui/TransactionTracing.h"
+#include "gui/ISurfaceComposer.h"
+
+#include <private/gui/ComposerService.h>
+
+namespace android {
+
+sp<TransactionTraceListener> TransactionTraceListener::sInstance = nullptr;
+std::mutex TransactionTraceListener::sMutex;
+
+TransactionTraceListener::TransactionTraceListener() {}
+
+sp<TransactionTraceListener> TransactionTraceListener::getInstance() {
+ const std::lock_guard<std::mutex> lock(sMutex);
+
+ if (sInstance == nullptr) {
+ sInstance = new TransactionTraceListener;
+
+ sp<ISurfaceComposer> sf(ComposerService::getComposerService());
+ sf->addTransactionTraceListener(sInstance);
+ }
+
+ return sInstance;
+}
+
+binder::Status TransactionTraceListener::onToggled(bool enabled) {
+ ALOGD("TransactionTraceListener: onToggled listener called");
+ mTracingEnabled = enabled;
+
+ return binder::Status::ok();
+}
+
+bool TransactionTraceListener::isTracingEnabled() {
+ return mTracingEnabled;
+}
+
+} // namespace android
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